256 



TABLE II. Ferrous-ammoniumsulfate. 



Average value of «—26.49. 



However, in tlie lower concentrations, the state of things never 

 seemed so simple — now the number of magnetons rose to 27 and 

 higher, now it fell to 26. 



The thought of traces of imparity suggested itself tirst; or perhaps 

 the salt contained an excess of acid, however small it might be. 



Yet, a great many experiments, where solutions were measured 

 with widely different additions of sulphuric acid, showed again and 



